HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
São Tomé

$1,968+ Cheap flights from Dulles Intl (IAD) to São Tomé (TMS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TMS
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to São Tomé with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to São Tomé

Best flights from Dulles Intl to São Tomé
Discover carefully curated flight deals from Dulles Intl to São Tomé that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

This oojo deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/169:50 pmIAD - TMS
2 stops15h 50mMultiple Airlines
Mon 3/301:10 pmTMS - IAD
3 stops47h 45mMultiple Airlines
Deal found 12/14$1,968
This Arangrant deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/295:30 pmIAD - TMS
2 stops19h 35mTAP AIR PORTUGAL
Wed 2/118:00 pmTMS - IAD
2 stops24h 15mTAP AIR PORTUGAL
Deal found 12/16$3,377
This AranGrant deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/28:50 pmIAD - TMS
2 stops15h 50mEthiopian Air
Wed 2/117:00 amTMS - IAD
4 stops30h 00mEthiopian Air
Deal found 12/16$5,506
This AranGrant deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/3010:30 pmIAD - TMS
2 stops38h 35mTAP AIR PORTUGAL
Wed 2/118:00 pmTMS - IAD
2 stops24h 15mTAP AIR PORTUGAL
Deal found 12/16$3,384
This Arangrant deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/295:30 pmIAD - TMS
2 stops19h 35mTAP AIR PORTUGAL
Sat 2/1410:25 pmTMS - IAD
1 stop27h 35mTAP AIR PORTUGAL
Deal found 12/16$3,724
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/3010:30 pmIAD - TMS
2 stops38h 35mTAP AIR PORTUGAL
Sun 2/158:00 pmTMS - IAD
2 stops24h 15mTAP AIR PORTUGAL
Deal found 12/16$4,214
This Arangrant deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/315:30 pmIAD - TMS
2 stops19h 35mTAP AIR PORTUGAL
Wed 2/118:00 pmTMS - IAD
2 stops24h 15mTAP AIR PORTUGAL
Deal found 12/16$4,391
This Ethiopian Air deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ethiopian Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2810:00 amIAD - TMS
3 stops26h 40mEthiopian Air
Sun 2/157:00 amTMS - IAD
4 stops30h 00mEthiopian Air
Deal found 12/16$6,036
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/315:30 pmIAD - TMS
2 stops19h 35mTAP AIR PORTUGAL
Sun 2/158:00 pmTMS - IAD
2 stops24h 15mTAP AIR PORTUGAL
Deal found 12/16$5,400

Find flight deals from Dulles Intl to São Tomé

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to São Tomé (TMS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Ovago
2 stars

Round-trip from

$1,968
(oojo)
Provider with most accurate pricing for Washington, D.C. (WAS)-Sao Tome Is flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Sao Tome Is flights.
Search Deals
From Washington, D.C. Dulles Intl to Sao Tome Is
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to São Tomé that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to São Tomé that are best for you.

Fly from

Dulles Intl

Fly to

São Tomé

Route

Depart

Return

Price

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Mon 3/16

9:50 pm-5:40 pm

2 stops15h 50m

Sao Tome Is

Mon 3/30

1:10 pm-8:55 am

3 stops47h 45m

$1,968

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Thu 1/29

5:30 pm-6:05 pm

2 stops19h 35m

Sao Tome Is

Wed 2/11

8:00 pm-3:15 pm

2 stops24h 15m

$3,377

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Fri 1/30

10:30 pm-6:05 pm

2 stops38h 35m

Sao Tome Is

Wed 2/11

8:00 pm-3:15 pm

2 stops24h 15m

$3,384

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Thu 1/29

5:30 pm-6:05 pm

2 stops19h 35m

Sao Tome Is

Sat 2/14

10:25 pm-9:00 pm

1 stop27h 35m

$3,724

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Fri 1/30

10:30 pm-6:05 pm

2 stops38h 35m

Sao Tome Is

Sun 2/15

8:00 pm-3:15 pm

2 stops24h 15m

$4,214

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Sat 1/31

5:30 pm-6:05 pm

2 stops19h 35m

Sao Tome Is

Wed 2/11

8:00 pm-3:15 pm

2 stops24h 15m

$4,391

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Sat 1/31

5:30 pm-6:05 pm

2 stops19h 35m

Sao Tome Is

Sun 2/15

8:00 pm-3:15 pm

2 stops24h 15m

$5,400

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Mon 2/2

8:50 pm-5:40 pm

2 stops15h 50m

Sao Tome Is

Wed 2/11

7:00 am-8:00 am

4 stops30h 00m

$5,506

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Wed 1/28

10:00 am-5:40 pm

3 stops26h 40m

Sao Tome Is

Sun 2/15

7:00 am-8:00 am

4 stops30h 00m

$6,036

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Best time to book a flight from Dulles Intl to São Tomé

Have a flexible travel schedule? Discover the best time to fly to São Tomé from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to São Tomé. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to São Tomé from Washington, D.C. Dulles Intl?

    Sao Tome Is (TMS) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to São Tomé. You should not have trouble finding flights to Sao Tome Is from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the São Tomé airport from Washington, D.C. Dulles Intl. It is only a 3.1 mi journey from Sao Tome Is (TMS) to São Tomé’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to São Tomé?

    TAP AIR PORTUGAL can get you from Washington, D.C. Dulles Intl Airport to São Tomé in just under 19h 35m. Your travel time can differ by up to . The distance from Washington, D.C. Dulles Intl Airport to São Tomé is about 5884 mi.

  • Can I find deals for flights from Dulles Intl to São Tomé that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to São Tomé flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to São Tomé?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to São Tomé.

  • Can I find deals for business class flights from Dulles Intl to São Tomé?

    Yes. Cheapflights offers flight deals from Dulles Intl to São Tomé by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to São Tomé

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to São Tomé flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.